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    基于演化博弈论的功率控制和垂直切换研究

    Power Control and Vertical Handoff Based on Evolutionary Game Theory

    • 摘要: 基于演化博弈论分别构建了无线资源管理中功率控制和垂直切换的形式化模型,设计了一种基于定价机制的功率控制收益函数,根据3GPP对无线通信业务的分类,将切换判决过程划分为4个不同层次,降低了切换决策的复杂性,定义了目标网络的代价函数,将网络参数划分为成本型参数和收益型参数两类,并对其进行归一化处理,实现了异构网络参数比较的公平性.证明了功率控制博弈和垂直切换博弈中存在唯一的演化稳定策略,给出了基于演化博弈论的功率控制算法和垂直切换方案.仿真结果表明,给出的功率控制算法减少了网络中隐终端的数目,提高了网络容量;垂直切换方案既可以减少切换发生的频率,增加网络选择的准确性,又使运营商与用户之间的利益得到平衡.

       

      Abstract: The formal models of power control and vertical handoff of radio resource management are constructed respectively based on evolutionary game theory. A payoff function of power control is designed based on pricing mechanism. According to the classification of 3GPP for radio communication services, the handoff decision process is divided into 4 levels, which can reduce the handoff complexity. The cost function of target networks is defined. The network parameters are divided into 2 categories: cost and income parameters with normalization processing, and then the fairness of heterogeneous network parameters comparison is realized. It is proved that there exists unique evolutionary stable strategy in power control game and vertical handoff game. Then the algorithm of power control and the scheme of vertical handoff are presented based on evolutionary game theory. Simulation results show that the given algorithm of power control reduces the number of hidden terminals and improves the network capacity, and the scheme of vertical handoff not only reduces the handoff frequency while increasing the accuracy of network selection, but also balances the benefits between service providers and users.

       

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